Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 1183
The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2012, 11:44 PM CDT for Harmon County, Oklahoma; 19 counties in Texas. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2012, 11:44 PM CDT (04:44 UTC)
- Expired
- Jun 16, 2012, 1:15 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
Counties Harmon County, OK, Armstrong County, TX, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Wheeler County, TX
The radar
The Lubbock radar (KLBB), 114 km from the middle of the area, began a volume at 04:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 4.7 hours before the alert went out and 153 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1006 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 2140 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
817
ACUS11 KWNS 160444
SWOMCD
SPC MCD 160444
TXZ000-OKZ000-160615-
MESOSCALE DISCUSSION 1183
NWS STORM PREDICTION CENTER NORMAN OK
1144 PM CDT FRI JUN 15 2012
AREAS AFFECTED...TX PANHANDLE...WEST AND NORTHWEST TX...
CONCERNING...SEVERE THUNDERSTORM WATCH 399...
VALID 160444Z - 160615Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 399
CONTINUES.
SUMMARY...AN ISOLATED SEVERE THREAT WILL CONTINUE WITH CONVECTION
MOVING EWD INTO NW TX. HOWEVER...THE THREAT SHOULD BECOME
INCREASINGLY MARGINAL AND AN ADDITIONAL WW ISSUANCE IS NOT
ANTICIPATED.
DISCUSSION...A LINE OF THUNDERSTORMS IS ONGOING FROM JUST EAST OF
AMARILLO EXTENDING SWD TO JUST EAST OF LUBBOCK LOCATED NEAR A
MAXIMUM OF STRONG INSTABILITY. MLCAPE VALUES ARE ESTIMATED FROM 300O
TO 4000 J/KG IN THE SERN TX PANHANDLE AND THIS MAY ENABLE THE LINE
OF STORMS TO PERSIST FOR SEVERAL MORE HOURS. HOWEVER...RADAR TRENDS
SUGGEST OUTFLOW WITH THE CONVECTION HAS PUSHED WELL TO THE EAST INTO
THE LOW ROLLING PLAINS. THIS ALONG WITH A RELATIVELY WEAK SHEAR
ENVIRONMENT SUGGESTS THE WIND DAMAGE THREAT WILL BE MARGINAL. THE
STRONG INSTABILITY AND STEEP MID-LEVEL LAPSE RATES SHOULD ALSO MAKE
HAIL A POSSIBILITY WITH THE STRONGER UPDRAFTS.
..BROYLES/CARBIN.. 06/16/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...SJT...LUB...AMA...
LAT...LON 33000088 33379990 33999941 34829950 35509982 35670049
35310127 34510167 33840157 33310166 33080152 33000088SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 11:25 PM CDT | Mesoscale Discussion | SPC | Harper | 95 min |
| Jun 16, 1:45 AM CDT | Mesoscale Discussion | SPC | Harmon | 60 min |
| Jun 16, 4:10 AM CDT | Mesoscale Discussion | SPC | Grant | 65 min |
| Jun 16, 3:02 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 20 more | 88 min |
| Jun 16, 6:24 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Ellis, Harper, Texas | 96 min |
| Jun 15, 8:37 PM CDT | Mesoscale Discussion | SPC | Briscoe, Castro, Crosby, Dickens, Floyd, Garza and 10 more | 23 min |
| Jun 15, 8:39 PM CDT | Severe Thunderstorm Watch | SPC | Briscoe, Castro, Childress, Cottle, Crosby, Dickens and 14 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.